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WO1996013934A1 - Procede et appareil pour effectuer des enregistrements dans un magnetoscope video a l'aide de la selection par mots cles de donnees prediffusees - Google Patents

Procede et appareil pour effectuer des enregistrements dans un magnetoscope video a l'aide de la selection par mots cles de donnees prediffusees Download PDF

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Publication number
WO1996013934A1
WO1996013934A1 PCT/US1995/013731 US9513731W WO9613934A1 WO 1996013934 A1 WO1996013934 A1 WO 1996013934A1 US 9513731 W US9513731 W US 9513731W WO 9613934 A1 WO9613934 A1 WO 9613934A1
Authority
WO
WIPO (PCT)
Prior art keywords
video signal
digital data
vcr
key word
audio signal
Prior art date
Application number
PCT/US1995/013731
Other languages
English (en)
Inventor
Peter J. Sprague
Original Assignee
Wave Systems Corp.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wave Systems Corp. filed Critical Wave Systems Corp.
Priority to EP95937623A priority Critical patent/EP0788712B1/fr
Priority to DE69525061T priority patent/DE69525061T2/de
Publication of WO1996013934A1 publication Critical patent/WO1996013934A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/08—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division
    • H04N7/084—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the horizontal blanking interval only
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/765—Interface circuits between an apparatus for recording and another apparatus
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/08—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division
    • H04N7/087—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the vertical blanking interval only
    • H04N7/088—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the vertical blanking interval only the inserted signal being digital
    • H04N7/0887—Systems for the simultaneous or sequential transmission of more than one television signal, e.g. additional information signals, the signals occupying wholly or partially the same frequency band, e.g. by time division with signal insertion during the vertical blanking interval only the inserted signal being digital for the transmission of programme or channel identifying signals

Definitions

  • the present invention relates to video broadcast information systems in which selected video news items are delivered to consumers by recording each selected video news item on a VCR cassette in accordance with user selected key word criteria.
  • Video news services such as satellite delivered cable television news channels provide continuous coverage of general interest news to a wide audience.
  • Many news broadcast services which only broadcast news, repeat important stories often, so that subscribers who have recently tuned in will not miss an important news item.
  • a viewer tunes in and listens long enough for an update of the current events and top news stories.
  • receiving video news of particular interest to a specific viewer is mostly a matter of being tuned in at the right time. Except for the most important news stories, which are repeated often, the more specialized news items which are of lesser general interest are repeated less often, or not repeated at all. Also, a more timely news item may replace a less timely, but still important news item.
  • specialized news channels provide continuous coverage of news events which relate to a specific category of news.
  • a specialized news channel may broadcast only stories relating to sports or finance, or the like.
  • a specialized broadcast news service may contain a wider range of news than a particular subscriber desires.
  • a subscriber's interests may be spread across more than one news category.
  • the present invention is embodied in a system method and apparatus for selectively recording on a VCR cassette, those news items of interest to a particular subscriber.
  • an advance data stream representing the text of each upcoming broadcast news item is provided in advance of the video broadcast of that news item.
  • the subscriber enters one or more key word criteria representative of the news items of interest, i.e., representing a desired word pattern match.
  • the user selected key word criteria is stored in a memory.
  • the advance data stream is searched for a match with any of the key word criteria entered by the subscriber. If a match between the stored user selected key word criteria and the advance data stream is found, the subscriber's VCR is enabled at the appropriate later time to record the desired news item. Since the data stream representing the text of the video news item is provided in advance, the news item selected as a result of the key word match may be recorded in its entirety.
  • the VCR cassette After a given time interval (e.g., after a day of broadcasting), the VCR cassette contains only those news items of interest to the particular subscriber, which the subscriber may watch at any convenient later time. In such manner, the subscriber will save time by not having to watch every news item. Instead, by viewing the VCR recording at a later time, the subscriber will be kept informed of those news items of specific interest to the individual subscriber.
  • FIG. 1 is block diagram of a system for selectively recording video items on a VCR in accordance with the present invention.
  • Figure 2 is a block diagram of an encoder for encoding video signals for selectively recording video items on a VCR used in conjunction with the present invention.
  • Figure 3 is an illustration of a timing diagram of a video signal with a time advanced data stream used in conjunction with the present invention.
  • Figure 4 is an illustration of a video signal including advanced text data signals encoded on the horizontal synchronizing pulses of a video signal used in conjunction with a first embodiment of the present invention.
  • Figure 5 is an illustration of a video signal including advanced text data signals encoded on the vertical synchronizing interval of a video signal used in conjunction with a second embodiment of the present invention.
  • FIG. 6 is a block diagram of a first embodiment of a VCR system controller in accordance with the present invention.
  • FIG. 7 is a block diagram of a second embodiment of VCR system controller in accordance with the present invention.
  • FIG. 2 A block diagram of an encoder for encoding video signals with an advance text data stream is shown in figure 2.
  • the digitized text of each video news item is prepared in advance.
  • advance text may be available from the text normally previously entered and later read by television news reporters during the broadcast.
  • the composite video and audio signal 22 is combined with the time advanced digitized text 24 in a transmitter 26.
  • a timing diagram of a composite video signal with a time advanced data stream is illustrated in figure 3.
  • a standard television signal consists of video lines 30, 34 separated by horizontal synchronization intervals 32, 36.
  • the audio portion 38 of the composite video signal is carried as an FM signal modulating a 4.5 Mhz subcarrier.
  • a digitized advanced text data stream 41 corresponding to the audio portion of the composite video signal, but advanced in time, is also transmitted with the composite video data stream.
  • the composite video signal may alternatively be a compressed digital video signal.
  • a new item field marker 40 indicates where the text for the previous item ends, and the text for the next new item begins.
  • new item field marker 40 indicates the beginning of the text 42 of the next news item N+l, following the previous text 44 of the previous news item.
  • a television 10 receives an input signal through a VCR 12 connected to a source of video signal at terminal 11.
  • the video signal at terminal 11 is also coupled to a data separator which separates digital data carried on the broadcast video signal and provides such separated digital data to controller 18.
  • a keypad 20 through which the subscriber enters selected key word criteria is coupled to controller 18.
  • Controller 18 also connected to an infrared (IR) emitter 16.
  • IR infrared
  • the subscriber enters key words through keypad 20 representative of the video programs of interest.
  • the controller 18 searches the advance data stream received from data separator 14. When a match is found, controller 18 through IR emitter 16 turns VCR 12 on and off at the appropriate times to record the video program which corresponds to the match.
  • a match may consist of an exact match between a single key word and the same word found in the advance data stream.
  • a match may also be any of typically well known search conventions or search criteria such as a root word with wild card character, a range search or the like.
  • a first embodiment of the invention is shown in figure 4.
  • Data is encoded on the horizontal synchronizing pulses and spread throughout the video signal.
  • one or more data bits 48, 52 and 56 are encoded on respective horizontal synchronizing pulses 46, 50 and 54 separating the video lines 45, 58.
  • the data bits 48, 52 and 56 represent advanced text data spaced throughout the video signal and transmitted in delayed real time synchronism with the audio portion of the video signal.
  • the advanced text data is stripped from the video signal by separator 14.
  • the received text is coupled to a detector 72, which detects the occurrence of a new item field marker.
  • the received text is also coupled to the search and compare logic 74.
  • a keypad 20 is coupled to a key word register 76 (a memory for storage of one or more key words or key word search criteria), the output of which is coupled to the search and compare logic 74.
  • the reset input of flip-flop 78 is coupled to the output of the new item field marker detector 72, which also serves as the input clock (input data strobe) to a first in, first out (FIFO) memory buffer.
  • the set input of flip-flop 78 is coupled to the output of the search and compare logic 74.
  • a delay 84 provides a delayed signal corresponding to the output of the new item field detector 72 to provide a delayed version of that signal which serves as the output clock (output data strobe) of FIFO 82.
  • the data output of FIFO 82 is coupled to a VCR recording control memory 80, the output of which is coupled to IR emitter 16.
  • flip-flop 78 indicates the decision as to whether the later broadcast video news item corresponding to the advance text being received contains a key word match and is therefore to be recorded by the VCR 12 (in figure 1).
  • a reset condition of flip-plop 78 at the end of the advanced text reception indicates that the news item is not to be recorded.
  • a set condition of flip-flop 78 at the end of the advanced text reception indicates that the news item is to be recorded.
  • the detection of the new item field by detector 72 stores the current contents of flip-flop 78 in FIFO 82, and resets flip-flop 78. If at any time during the advanced text of the news item, the search and compare logic 74 detects a match between the contents of the key word register 76 and the data stream from data separator 14, then flip-flop 78 will be set. Thus, when the next new item field marker is received, the clock in to FIFO 82 causes the contents of flip-flop 78 to be recorded in FIFO 82.
  • the video of the news item is delayed by a fixed amount measured from its corresponding new item field marker.
  • the fixed delay is substantially equal to the delay provided by clock delay 84.
  • the output of delay 84 to the clock in signal of FIFO 82 causes FIFO 82 to output the previously stored value of flip-flop 78 to VCR recording control memory 80.
  • a predetermined delay from the occurrence of a key word match may be used to record a portion of the video signal in some fixed time interval before and after the occurrence of the key word match. In the latter case the new item field separators may be eliminated.
  • the VCR recording control memory 80 contains the control codes necessary to drive the IR emitter 16 which turns on and turns off VCR 12 at the appropriate time. That is, responsive to the stored bits in FIFO 82, the VCR recordin; control memory 80 causes the VCR to record the video news items selected as a result of matches between the advanced text received from data separator 14 and the contents of key word register 76.
  • time advanced data is encoded in more concentrated form on one line of each vertical blanking interval, or for consecutive vertical blanking intervals, just before the beginning of each news item to which such data relates.
  • a burst of data is encoded in the vertical interval 60, as a group of data bits 70 on an unused video line in the vertical blanking interval.
  • data may be carried in other portions of the video signal.
  • data may also be carried on one or more unused video lines 62, 64, 66, 68 of the vertical blanking interval, modulated on an in-band subcarrier signal or on an out of band carrier signal transmitted simultaneously, but not within the spectrum occupied by the video signal .
  • FIG. 7 illustrates a block diagram of a VCR system controller in accordance with the second embodiment of the present invention. Since the data is concentrated as a burst of data occurring just before the video news item to which it relates, the text of the received news item can be searched just before the video news item is received. The decision to record or not to record the broadcast video news item is made just before the news item begins. The VCR is set to record mode, and on left on pause. In recording pause mode, the VCR can begin recording relative quickly.
  • An important advantage of the second embodiment is that it simplifies the VCR system controller. In particular, the FIFO 82 memory and delay 84 of figure 6 are not necessary, and are eliminated. Instead of a delay 84, the Q output of flip-flop 78 is coupled to VCR recording control memory 80 without substantial delay.
  • a new field marker is detected 72 which sets flip-flop 78.
  • the data following the new field marker is searched by search and compare logic 74 to detect a match, if any, between the received data and the contents of key word register 76. If no match is detected, the VCR recording control memory outputs a control signal to stop any VCR recording. If a match is detected, the VCR recording control memory outputs a control signal to start the VCR recording. In such manner, news items which contain text matching the key word register contents will be recorded on the VCR cassette.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Television Systems (AREA)
  • Television Signal Processing For Recording (AREA)

Abstract

Cette invention se rapporte à un procédé et à un appareil d'exploitation d'un système permettant d'enregistrer selectivement sur un magnétoscope vidéo (12) les nouvelles qui présentent un intérêt pour un abonné particulier. On sélectionne à cet effet les nouvelles vidéo diffusées en fonction de critères à mots clés choisis par l'utilisateur et préalablement entrées par lui. Un flux de données prédiffusées (41), représentant le texte de chaque nouvelle qui va être diffusée, est fourni avant la vidéodiffusion de la nouvelle en question. Ce flux de données prédiffusées (41) est recherché jusqu'à ce qu'il y ait coïncidence avec l'un des critères à mots clés préalablement entrés par l'abonné. Si une coïncidence est trouvée entre les critères à mots clés, choisis par l'utilisateur et mis en mémoire, et le flux de données prédiffusées, le magnétoscope vidéo de l'abonné est mis en marche à l'heure appropriée pour enregistrer la nouvelle désirée. La cassette du magnétoscope vidéo (12) contient alors les nouvelles présentant un intérêt pour cet abonné particulier, lequel peut les regarder à n'importe quel moment qui lui convient.
PCT/US1995/013731 1994-10-26 1995-10-23 Procede et appareil pour effectuer des enregistrements dans un magnetoscope video a l'aide de la selection par mots cles de donnees prediffusees WO1996013934A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP95937623A EP0788712B1 (fr) 1994-10-26 1995-10-23 Procede et appareil pour effectuer des enregistrements dans un magnetoscope video a l'aide de la selection par mots cles de donnees prediffusees
DE69525061T DE69525061T2 (de) 1994-10-26 1995-10-23 Verfahren und vorrichtung zur aufnahmesteuerung eines videorecorders durch vorab ausgesendete stichworte

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/329,345 US6895169B1 (en) 1994-10-26 1994-10-26 Method and apparatus for VCR recording using key word selection of advance broadcast data
US08/329,345 1994-10-26

Publications (1)

Publication Number Publication Date
WO1996013934A1 true WO1996013934A1 (fr) 1996-05-09

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PCT/US1995/013731 WO1996013934A1 (fr) 1994-10-26 1995-10-23 Procede et appareil pour effectuer des enregistrements dans un magnetoscope video a l'aide de la selection par mots cles de donnees prediffusees

Country Status (4)

Country Link
US (1) US6895169B1 (fr)
EP (1) EP0788712B1 (fr)
DE (1) DE69525061T2 (fr)
WO (1) WO1996013934A1 (fr)

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US8510405B2 (en) 2000-09-23 2013-08-13 Koninklijke Philips N.V. Handling broadcast data tokens

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Also Published As

Publication number Publication date
DE69525061D1 (de) 2002-02-21
EP0788712B1 (fr) 2002-01-16
DE69525061T2 (de) 2002-09-05
US6895169B1 (en) 2005-05-17
EP0788712A1 (fr) 1997-08-13
EP0788712A4 (fr) 1998-12-02

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